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Optimal group testing

Published online by Cambridge University Press:  28 January 2021

Amin Coja-Oghlan*
Affiliation:
Goethe University Frankfurt, Robert-Mayer-Strasse 6–10, 60325 Frankfurt, Germany
Oliver Gebhard
Affiliation:
Goethe University Frankfurt, Robert-Mayer-Strasse 6–10, 60325 Frankfurt, Germany
Max Hahn-Klimroth
Affiliation:
Goethe University Frankfurt, Robert-Mayer-Strasse 6–10, 60325 Frankfurt, Germany
Philipp Loick
Affiliation:
Goethe University Frankfurt, Robert-Mayer-Strasse 6–10, 60325 Frankfurt, Germany
*
*Corresponding author. Email: acoghlan@math.uni-frankfurt.de
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Abstract

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In the group testing problem the aim is to identify a small set of k ⁓ nθ infected individuals out of a population size n, 0 < θ < 1. We avail ourselves of a test procedure capable of testing groups of individuals, with the test returning a positive result if and only if at least one individual in the group is infected. The aim is to devise a test design with as few tests as possible so that the set of infected individuals can be identified correctly with high probability. We establish an explicit sharp information-theoretic/algorithmic phase transition minf for non-adaptive group testing, where all tests are conducted in parallel. Thus with more than minf tests the infected individuals can be identified in polynomial time with high probability, while learning the set of infected individuals is information-theoretically impossible with fewer tests. In addition, we develop an optimal adaptive scheme where the tests are conducted in two stages.

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Type
Paper
Copyright
© The Author(s), 2021. Published by Cambridge University Press